Tumblr notes autoload

Adds a button to autoload all notes on Tumblr full page posts
当前为 2015-03-23 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name          Tumblr notes autoload
// @include       http://*tumblr.com/post/*
// @description   Adds a button to autoload all notes on Tumblr full page posts
// @version       1.1
// @author        wOxxOm
// @contributor   JesseW
// @namespace     wOxxOm.scripts
// @license       MIT License
// @run-at        document-start
// @grant         none
// ==/UserScript==

window.addEventListener('DOMContentLoaded', function(){
  var btn;
  var btnLabel = {load:'Load all notes', stop:'Stop loading notes', done:'All notes are loaded'};

  function clickMore() {
    if (btn.stopSignal) {
      delete btn.stopSignal;
      btn.textContent = btnLabel.load;
      return;
    }
    var more = document.querySelector('.more_notes_link');
    if (more) {
      more.click();
      var ob = new MutationObserver(function(mutations){
        ob.disconnect();
        setTimeout(function(){ clickMore() }, 200);
      });
      ob.observe(more.parentNode.parentNode, {subtree:true, childList:true});
    }
    else {
      btn.textContent = btnLabel.done;
      btn.disabled = true;
    }
  }
  
  document.querySelector('.notes').insertAdjacentHTML('beforebegin', 
       '<button id="loadallBtn" style="margin-bottom:1em">' + btnLabel.load + '</button>');
  btn = document.getElementById('loadallBtn');
  btn.addEventListener('click', function(){
    if (btn.textContent == btnLabel.load) {
      btn.textContent = btnLabel.stop;
      clickMore();
    } else {
      btn.stopSignal = true;
    }
  });
});